First: the dotcom bubble burst five years after it began, and the technological advancements didn't see "mass adoption" - because they were not consumer facing. I get the feeling that you're thinking that pets.com was the dotcom bubble... the bubble was centered around telecom technology - not retail websites. The bubble is fairly disconnected from what one would describe as the success of the internet today - web 2.0, the rise of APIs.
Second: The region of experience that blockchain tech is best suited to revolutionize, finance, is also the one that is most sensitive to rapid change and most heavily regulated. The US government is still grappling with the idea, hell - the NIST draft that was supposed to provide some clarity of what cryptocurrencies actually are got totally nuked by every interested party. I'm still waiting for the IRS to issue a clarifying statement on the tax handling of a hardfork so that I can amend last year's filing. It has led to a very strange situation where a hands-off approach has allowed for development, but also prevented integration.
Second: The region of experience that blockchain tech is best suited to revolutionize, finance, is also the one that is most sensitive to rapid change and most heavily regulated. The US government is still grappling with the idea, hell - the NIST draft that was supposed to provide some clarity of what cryptocurrencies actually are got totally nuked by every interested party. I'm still waiting for the IRS to issue a clarifying statement on the tax handling of a hardfork so that I can amend last year's filing. It has led to a very strange situation where a hands-off approach has allowed for development, but also prevented integration.